Untitled Document
 
 
 
 
Stainless steel Flexible pipe
Copper pipe
Material
STS304(27kinds)
CU(Phosphorus-Deoxidized Copper)
Durability
120year
-
Weather resistance

Absolutely no abnormality

Absolutely no abnormality

Tensile Strength
73.6kg/㎟
32kg/㎟
pressure-induced miscibility
25kg/㎠
14.1kg/㎠
Bursting Pressure
(15Astandard)
190kg/㎠
-
Thermal conductivity
14.02Kcal/Min℃
332Kcal/Min℃
Heat transfer
388.2Kcal/3.3㎡.hr
280Kcal/3.3㎡.hr
Minimum bending radius
30mm
-
freeze and rupture winter-sowing
It does not freeze and rupture even if it is frozen 3 times repetitively

Frozen and ruptured

Thawing
It can be thawed easily with thawing device because of substantial electric resistance
Thawing device only thawed
Drainage pipe works

Work can be carried out conveniently without separate tools, and can be installed simply without any joints

 PXC, Although number of welded spots have been reduced substantially due to development of 808 copper pipe, welding works by proficient welder is necessary for the welded sections.
Expansion and contraction absorption
Good

Defective

Reliability

KS-Mark Product

KS-Mark Product
Heat distortion temperature
(Brittleness temp)
-70℃~450℃
-
 
 
Stainless steel pipe
Copper pipe
Steel pipe
Applied formula
Flexible pipe
Straight Pipe
15A
13SU(M-Type)
1/2(M-Type)
154A
18.1×0.3t
15.88×0.6t
15.88×0.71t
21.7×2.65t
Nusselt Number
Nu(w/㎡℃)
14.46
19.71
22.07
19.93
Inner thermal resistance coefficient
hi(w/㎡℃)
386.4
776.5
998.2
794.8
Surface thermal coefficient
Rs(w/㎡℃)
Inner thermal resistance coefficient
Ri(㎡℃/w)
0.037
0.0247
0.022
0.0244
Exterior thermal resistance coefficient
Ro(㎡℃/w)
1.51
2.0
2.13
1.68
Exterior thermal resistance coefficient
ho(㎡℃/w)
8.4
9.254
9.42
8.72
Heat transfer coefficient
w/m℃
w/㎡℃
per ㎡
0.647
0.494
0.466
0.584
per ㎡
8.2
(7.06Kcal/㎡h℃)
9.148
(7.9Kcal/㎡h℃)
9.32
(8.01Kcal/㎡h℃)
8.56
(7.4Kcal/㎡h℃)
Surface temperatur(to)
59.08℃
59.53℃
59.15℃
59.4℃
-
Internal temperature (ti)
59.086℃
59.54℃
59.16℃
59.42℃
-
Heat transfer
(Kcal/area per hr)
386.2
301
280
354
* Heat transfer per area per hour
Area of tube surface
per(1㎡)
12.7m
18.5m
20m
14.7m
* Based on 17m
Remarks
Equivalent ID-0.2245m
Equivalent OD-0.025m
Kp-10.3
ID=0.0166
OD-0.0172
Kp-16.3
ID=0.01446
OD-0.01588
Kp-386
ID=0.0166
OD-0.0172
Kp-52
1. Water temperature (tw)=60℃
2.Ambient temperature (tw)=18℃
3.Flux in the tube(Gw)=60ℓ/hr
4.Heat transfer coefficient of pipe =Kp
5.Heat transfer coefficient of water=Kw